S. polymorpha may refer to:
Sacciolepis polymorpha, a true grass Scolopendra polymorpha, a centipede indigenous to the Southwestern United States and northern Mexico Siphonosopra polymorpha, a possibly carcinogenic microorganism Sporichthya polymorpha, a gram-positive bacterium Stigmella polymorpha, a pigmy moth Synaphea polymorpha, a plant endemic to Western Australia